Acta Theologica Supplementum 7 2005 THE ERUPTION OF VESUVIUS IN AD 79 AND THE DEATH OF GAIUS PLINIUS SECUNDUS ABSTRACT The effect of the volcanic eruption of Vesuvius in AD 79, which led inter alia to the death of Pliny the Elder, is reviewed. Pliny, the admiral of the Roman imperial fleet, wished as scientist to witness the event from close by and set sail in the direction of Vesuvius, but got trapped in Stabiae, a few kilometers from Pompeii, where he died to- gether with thousands of inhabitants of nearby villages. Various reasons have been ad- vanced to account for his death (asphyxiation caused by respiratory problems, carbon dioxide poisoning, heart failure, advanced coronary sclerosis). Basing our findings on the description of the catastrophe in the letters of his nephew, the younger Pliny, we believe that the most probable diagnosis which also fits his description of his uncle’s behaviour and symptoms during his last hours, is that of acute and fatal bronchocon- striction in a chronic asthmatic. 1. INTRODUCTION On 24 August AD 79 Vesuvius erupted, burying neighbouring Pom- peii in ashes, stones and pumice, Herculaneum in volcanic mud, and Stabiae in ashes. Thousands of people lost their lives in this disaster. This was the second recorded eruption, the first being on 5 February AD 63.1 In the centuries thereafter Vesuvius has erupted nearly 50 times, most recently during the Allied invasion in 1944. Due to its inactivity the past 60 years, this volcano is at present the primary geological worry of Europe because of its potential explosivity: c. 1,5 million people live in the vicinity of the mountain. The eruption of AD 79 is described vividly by an eye-witness, Pliny the Younger, in two letters to the historian Tacitus (Epistulae 6.16 and 20), in response to the latter’s enquiry about the death of Pliny’s uncle, Pliny the Elder, during the catastrophe.2 1 Thus recorded by Tacitus Annals 15.22-23. For literature on subsequent erup- tions in antiquity, cf. Sherwin-White (1966:372). 2 Cf. the articles of Sullivan (1968:196-200), Sigurdsson et al. (1982:39-51) and Bisel (1987:11-23) in which the authors attempt to bring the information given by Pliny in line with modern volcanology. Bisel compares the eruption of Vesuvius in AD 79 with that of Mt. St. Helens, a similar but smaller volcano in the U.S.A. 107 The eruption of Vesuvius in AD 79 2. THE ERUPTION OF AD 79 The elder Pliny was at the time of the eruption the admiral of the impe- rial fleet at Misenum at the northern end of the Bay of Naples. Wishing as a scientist to get a closer view of the mountain, he ordered a light ves- sel to be prepared, but when he received an appeal for help from a friend trapped at the foot of the mountain, he changed his plan and ordered large galleys to proceed to Vesuvius to rescue the endangered people along the thickly populated coast. However, when his large vessel could not dock at Herculaneum or Pompeii (either because of the seismic elevation of the sea-bed or the landslide of volcanic mud streaming down from the slopes of Vesuvius into Herculaneum and on into the sea), Pliny continued further along the coast to Stabiae, a town a few kilo- meters south of Pompeii. Having sailed in with a favourable wind from the north west, he found that they could not leave again because of the contrary wind. After spending a terrifying night in the house of his friend Pomponianus (with only the elder Pliny sleeping soundly), they decided to move out into the open, fearing to be barricaded by the rising level of the ashes and pumice stones or crushed by falling build- ing material in the continual earth tremors. As it happened, Stabiae and Pompeii were spared the flow of volcanic lava,3 but the heavy showers of ashes proved to be equally devastating and completely buried the two towns with a layer of ashes up to 6 m. deep, crushing buildings by its weight. In fact, even those who managed to reach the open were in danger of being overwhelmed by the rain of ashes, as is evident from the younger Pliny’s description of their experiences at Misenum, which is about 38 kilometers from Vesuvius — and thus way out of the focal point: We rose from time to time and shook it [the ashes] off, otherwise we would have been buried and crushed beneath its weight (Epistula 6.20.16, own translation). The younger Pliny who did not accompany his uncle but stayed at Misenum, received news of the elder Pliny’s death from Pomponianus and the slaves who managed to escape. He describes his uncle’s last hours as follows: 3 What geographers call a “Vesuvian eruption” produces steam, dust and stone, and sometimes streams of lava, absent in this occasion (Sherwin-White 1969:129). 108 Acta Theologica Supplementum 7 2005 Figure 21: The Arch of Caligula in the Forum of Pompeii, with Vesuvius in the background. They decided to go to the shore and investigate on the spot whether the sea admitted any escape, but it remained wild and dangerous. There, lying down on a sheet which was spread on the ground, he (i.e. Pliny the Elder) repeatedly asked for cold water to drink. Then the flames and the precursor of the flames, the smell of sulphur, drove the others to take flight and roused him. He got up, leaning on two slaves, and immediately collapsed, as I imagine, because the 109 The eruption of Vesuvius in AD 79 dense fog choked his breathing and blocked his trachea, which was by nature weak and narrow and often inflamed. When daylight returned (the third day after the last day he had seen), his body was found intact and uninjured and still fully clothed, and looking more like a person sleeping than one who had died. (Ep. 6.16.17-20, own translation). 3. THE DEATH OF PLINY: DIAGNOSES Various reasons have been advanced to account for the death of Pliny the Elder. In his letter the younger Pliny obviously wishes to portray his uncle as the great humanitarian sacrificing his own life in his attempt to rescue those endangered by the eruption, with the result that one may expect that some details may have been omitted or over-emphasised. However, his diagnosis seems to be objective and probably as close to relevant as can be expected in the 1st/2nd century AD: asphyxiation brought about by respiratory problems. This diagnosis is in fact to a great extent echoed by most scholars.4 Sherwin-White (1966:374), referring to a passage earlier on in the same letter, further remarks: He was perhaps asthmatical, whence the heavy snores5 of par. 13, and died the more quickly, like victims of London ‘smog’. 4 Bisel (1987:12-13), a pathologist, examined the skeletons of the victims found on the beach front of Herculaneum, and came to the conclusion that a ground surge of hot ash and gas, moving at high speed, must have overpowered and asphyx- iated the Herculaneans almost immediately. Since, however, excavations have revealed that the towns around Vesuvius had different kinds of deposits which would have depended on i.a. the direction of the wind and the distance from the volcano, the reasons for the death of the victims would not necessarily have been the same in the different regions. Basing his diagnosis on Pliny’s description of the showers of ashes in Stabiae, Ziegler (1893-1963:Vol. XXI, pp. 283-284) ascribes the death of the elder Pliny to an obstruction in the trachea. Grmek (1987:35) and Van der Paardt (1991:59) reject this theory of asphyxiation, since a person who had choked to death would, according to them, not have had a peaceful facial expression. From a purely medical point of view, however, this is possible, since the facial muscles relax at death. 5 Pliny the Younger ascribes the snoring during the night spent at Stabiae to the fact that his uncle was a stout man (per amplitudinem corporis). The fact that Pliny uses the periphrasis meatus animi ... gravior et sonantior (“his breathing was rather laboured and loud”) to describe his uncle’s snoring instead of the usual verb stertere, could be seen as an indication of his serious asthmatic condition. 110 Acta Theologica Supplementum 7 2005 Figure 22: Plastercasts of victims, Pompeii. The possibility of carbon dioxide poisoning has also been men- tioned (Van der Paardt 1991:59), but is queried by several scholars on the ground that other people would also have been affected by it in some way or other. Schönberger’s objection (1990:548) that the poisonous gases could not have reached Stabiae because the wind was not blowing from the direction of the mountain, is not valid, since it is clear from Epistula 6.20.11 (where the younger Pliny describes how the view of the island of Capri had been blotted out by a dark cloud) that the wind had swung round and was now blowing from the mountain, that is, from the north east. Another theory which has been put forward is heart failure. L. Sprague de Camp (1963:225) gives the following reason for Pliny’s death: ... while waiting to embark, Plinius suddenly fell dead. He was fat, asthmatic and in his fifties, and all this scrambling about through a rain of volcanic debris had been too much for his heart.